In a vertical section of a typical dicot leaf, the phloem in the mid-vein is situated :

Options

A. facing the lower epidermis
B. facing the upper epidermis
C. facing sideways
D. all around the xylem

Explanation

**Step-by-Step Solution:**

1. **Understanding the Structure of a Dicot Leaf:**
- A dicot leaf is characterized by a distinct midrib or mid-vein, which is the central vein running through the leaf.
- The leaf has two surfaces: the upper surface (adaxial) and the lower surface (abaxial).

2. **Identifying the Vascular Bundles:**
- In a vertical section of a dicot leaf, the vascular bundles, which include xylem and phloem, are present.
- The xylem is responsible for transporting water and minerals, while the phloem transports food (sugars).

3. **Locating the Phloem in the Mid-Vein:**
- In the case of a dicot leaf, the phloem is always located on the lower surface of the vascular bundle, facing the lower epidermis (abaxial surface).
- This arrangement is crucial for the leaf's function, as it allows for efficient transport of nutrients.

4. **Conclusion:**
- Therefore, in a vertical section of a typical dicot leaf, the phloem in the mid-vein is situated at the lower epidermal surface (abaxial surface).

**Final Answer:**
The phloem in the mid-vein of a typical dicot leaf is situated at the lower epidermal surface.

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